公开(公告)号：US20200003592A1

公开(公告)日：2020-01-02

申请号：US16465224

申请日：2017-10-11

Applicant: Endress+Hauser Flowtec AG

Inventor： Thomas Sulzer ,  Florent Tschambser

IPC: G01F1/58 ,  C09D5/00 ,  C09D177/04 ,  C09D177/02 ,  C08G69/10 ,  C08G69/14

Abstract: A magnetically inductive flow meter having a measuring tube with a wall, which includes an electrically insulating surface of a first material, and an electrode having an electrode axis, wherein the electrode has at least one electrode end surface for tapping off a measuring signal, in particular a measuring voltage, in a measuring medium, and has an electrode shank extending through the measuring tube wall, wherein the electrode has a stop projecting from the electrode shank with a stop surface to limit the displaceability of the electrode relative to the wall along the electrode axis, wherein the electrode has an electrically insulating coating in a region of the electrode shank and in a region of the stop surface, wherein the material of the electrically insulating coating has a Shore hardness which is equal to or lower than that of the first material.

公开(公告)号：US20220381593A1

公开(公告)日：2022-12-01

申请号：US17755069

申请日：2020-09-24

Applicant: Endress+Hauser Flowtec AG

Inventor： Thomas Sulzer ,  Florent Tschambser ,  Lars Dreher

IPC: G01F1/56 ,  B29D23/00

Abstract: A measuring tube includes a support tube having a metal wall surrounding a lumen, a thermoplastic liner lining the support tube and a sensor element. The liner tube has an outer diameter less than an inner diameter of the support tube, and the wall of the liner tube has a fold, such that both the lumen and a lateral surface of the liner tube have a form deviating from that of a circular cylinder. The lateral surface is curved concavely. The liner tube is positioned in the lumen and heated into a viscoelastic state and deformed such that the wall of the liner tube unfolds and presses against the wall of the support tube, such that the lateral surface is curved convexly. The liner tube is cooled and a shape is formed between the liner tube and support tube for durably securing the liner tube in the support tube.

公开(公告)号：US20210131844A1

公开(公告)日：2021-05-06

申请号：US17256485

申请日：2019-05-23

Applicant: Endress+Hauser Flowtec AG

Inventor： Florent Tschambser ,  Lars Dreher ,  Fred Kappertz

IPC: G01F1/60 ,  G01F1/58

Abstract: Disclosed is a method for commissioning a magneto-inductive flow measuring device having means for producing a magnetic field and at least one measuring electrode pair for sensing a potential difference in a medium. The method includes a settling of the means during a settling time for stabilizing the magnetic field. During the settling time a first voltage time function is applied to the means, wherein after the settling time a measuring time begins, wherein during the measuring time a second voltage time function is applied to the means, wherein the settling time is divided into first time intervals, each of which has a duration, wherein the measuring time is divided into second time intervals, each of which has a duration, wherein an average value of all first interval durations is always less than an average value of all second interval durations.

公开(公告)号：US20190277679A1

公开(公告)日：2019-09-12

申请号：US16463166

申请日：2017-10-10

Applicant: Endress+Hauser Flowtec AG

Inventor： Florent Tschambser ,  Markus Rüfenacht

IPC: G01F1/58 ,  G01F1/60

Abstract: The present disclosure relates to a method for operating a magnetic-inductive flow meter. The method includes steps of generating a magnetic field in a medium during a feeding phase, wherein the feeding phase has a shot phase and a measuring phase, and measuring a coil current. The method also includes switching over from the shot phase to the measuring phase as soon as the coil current reaches a limit value, recording a time period from the beginning of the feeding phase to reaching the limit value, and determining a deviation of the time period from a target time period. The method further includes generating the magnetic field during a subsequent feeding phase, where a shot voltage of the subsequent feeding phase is adapted in dependence on the deviation in order to reduce the deviation of the time period from the target time period of the next feeding phase.

公开(公告)号：US20170261356A1

公开(公告)日：2017-09-14

申请号：US15510853

申请日：2015-08-19

Applicant: Endress + Hauser Flowtec AG

Inventor： Florent Tschambser ,  Lars Dreher ,  Thomas Sulzer

IPC: G01F1/58

CPC classification number: G01F1/58 ,  G01F1/588 ,  G01F15/14 ,  G01F15/18

Abstract: A method for manufacturing an apparatus for measuring flow of a fluid flowing through a measuring tube of metal using the magneto-inductive principle, comprising the method steps as follows: securing first and second collars of metal externally on the measuring tube with an orientation perpendicular to the tube axis of the measuring tube lining the measuring tube internally with an electrically non-conductive, elastic liner and altering a measuring section of the measuring tube located at least partially between the first collar and the second collar by means of cold deformation in such a manner that the cross sectional area of the measuring section is reduced compared with the cross sectional area of an inflow section of the measuring tube located upstream from the measuring section and an outflow section of the measuring tube located downstream from the measuring section.